(function($){
	$.fn.AdFloat = function(options){
		var defaults = {
			imgSrc : "", //漂浮图片路径
			url : "http://www.hangmou.com", //图片点击跳转页
			openStyle : 1, //跳转页打开方式 1为新页面打开  0为当前页打开
			speed : 10 //漂浮速度 单位毫秒
		};
		var options = $.extend(defaults,options);
		var _target = options.openStyle == 1 ?  "target='_blank'" : '' ;
		var html = "<div id='float_ad' style='position:absolute;left:0px;top:0px;z-index:1000000;cleat:both;'>";
		html += "  <a href='" + options.url + "' " + _target + "><img src='" + options.imgSrc + "' border='0' class='float_ad_img'/></a> <a href='javascript:;' id='close_float_ad' style=''>x</a>";
		html += "</div>";

		$('body').append(html);

		function init(){
			var x = 0,y = 0
			var xin = true, yin = true
			var step = 1
			var delay = 10
			var obj=$("#float_ad")
			obj.find('img.float_ad_img').load(function(){
				var float = function(){
					var L = T = 0;
					var OW = obj.width();//当前广告的宽
					var OH = obj.height();//高
					var DW = $(document).width(); //浏览器窗口的宽
					var DH = $(document).height();

					x = x + step *( xin ? 1 : -1 );
					if (x < L) {
						xin = true; x = L
					}
					if (x > DW-OW-1){//-1为了ie
						xin = false; x = DW-OW-1
					}

					y = y + step * ( yin ? 1 : -1 );
					if (y > DH-OH-1) {

						yin = false; y = DH-OH-1 ;
					}
					if (y < T) {
						yin = true; y = T
					}

					var left = x ;
					var top = y;

					obj.css({'top':top,'left':left});
				}
				var itl = setInterval(float,options.speed);
				$('#float_ad').mouseover(function(){clearInterval(itl)});
				$('#float_ad').mouseout(function(){itl=setInterval(float, options.speed)} )
			});
			// 点击关闭
			$('#close_float_ad').click(function(){
				$('#float_ad').remove();
			});
		}

		init();

	}; //floatAd

})(jQuery);